Evoked Response in Audiometry

Audiometrist: it’s a health care professional technician who received special training in the use of pure tones audiometry equipments. It conducts hearing tests, or the audiometric screening, with an audiometer to establish the hearing levels. Most of the results are represented by audiogram & usually interpreted by an audiologist, or a medical officer. Audiometrist is also known as audiologist, aims of diagnosing hearing loss.

Audiometrist vs Audiologist: Audiometrist is derived from the word audiometry, as it is distinct from Audiology. Sometimes title is often changing for the role of audiologists. Audiologists are referring themselves as audiometrists. Most of the audiometrist is involved in the hearing aids companies or industry. Education & licensing requirements vary from country to country. Audiologist is much qualified, & they can also do the work of audiometric.

Audiologist: health care professionals trained to identify, measuring the hearing impairments & the related disorders.

Audiometry:  it is a branch of audiology & the science of measuring hearing acuity for the variations in the sound intensity & for the tonal purity & some differing frequencies. Basically audiometric tests determines to the hearing levels with the help of an audiometers, ability to discriminate between different sound intensities recognizes the pitch, or distinguishes speech from the background noise. The results audiometric tests are used to diagnose or disease of the ears, & often makes use of an audiogram.

 

Image Courtesy: lsda.jsc.nasa.gov

    Hearing Assessment: most common used of the hearing assessment is the determination of the threshold of audibility. Before finishing up a hearing take a look at, it's vital to get info concerning the person’s past case history, not solely regarding the ears however additionally alternative conditions which can have an impression on attainable hearing disorder detected by associate mensuration take a look at. The hearing disorder is sometimes bilateral; however variations in every ear also can be discovered. Wax within the ear also can cause hearing disorder, which the ear ought to be examined to examine if syringing is needed; additionally to see if the tympanum has suffered any injury which can scale back the power of sound to be transported to the tube.

Types of audiometry: pure tone audiometry, speech audiometry, objective audiometry, & evoked response audiometry etc.

Process: The measure check may be dispensed mistreatment automatic or manual audiometers, however the essential check procedure is that the same:

the topic is asked to get rid of something which could upset the check results, e.g. spectacles, earrings, hearing aids.
Directions square measure given regarding the check procedure and also the subject is needed to point whether or not he/she will simply hear or cannot hear an exact sound (the sound level is also multiplied from a awfully low level or reduced from a high level).
Headphones square measure fitted rigorously over the ears and also the check is then dispensed on every ear.

Image Courtesy: www.wms.co.uk

 Firstly, a threshold check is undertaken during which every ear is subjected to sound at a mid-range pitch or frequency of one kc at variable degrees of loudness (in a sound unit range) starting from low to high and high to low. The procedure is recurrent many times in order that a mean threshold may be derived from the check. Thresholds will vary as a result of slight changes within the procedures adopted in putting in the check, e.g. variation of the position of the headphone on the ear.